[6] (>5% of decays) The quark composition of the ω meson can be thought of as a mix between uu, dd and ss states, but it is very nearly a pure symmetric uu-dd state.

This can be shown by deconstructing the wave function of the ω into its component parts.

We see that the ω and ϕ mesons are mixtures of the SU(3) wave functions as follows.

[7] where The mixing angle at which the components decouple completely can be calculated to be

Therefore, the ω meson is nearly a pure symmetric uu-dd state.